.pushsection .text, "ax"
SYM_CODE_START(ret_from_fork)
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR // copy_thread
movq %rax, %rdi
call schedule_tail /* rdi: 'prev' task parameter */
.align 16
.globl __irqentry_text_end
__irqentry_text_end:
+ ANNOTATE_NOENDBR
SYM_CODE_START_LOCAL(common_interrupt_return)
SYM_INNER_LABEL(swapgs_restore_regs_and_return_to_usermode, SYM_L_GLOBAL)
#endif
SYM_INNER_LABEL(native_irq_return_iret, SYM_L_GLOBAL)
+ ANNOTATE_NOENDBR // exc_double_fault
/*
* This may fault. Non-paranoid faults on return to userspace are
* handled by fixup_bad_iret. These include #SS, #GP, and #NP.
FRAME_BEGIN
swapgs
.Lgs_change:
+ ANNOTATE_NOENDBR // error_entry
movl %edi, %gs
2: ALTERNATIVE "", "mfence", X86_BUG_SWAPGS_FENCE
swapgs
#endif
repeat_nmi:
+ ANNOTATE_NOENDBR // this code
/*
* If there was a nested NMI, the first NMI's iret will return
* here. But NMIs are still enabled and we can take another
.endr
subq $(5*8), %rsp
end_repeat_nmi:
+ ANNOTATE_NOENDBR // this code
/*
* Everything below this point can be preempted by a nested NMI.
popfq
jmp .Lsysenter_flags_fixed
SYM_INNER_LABEL(__end_entry_SYSENTER_compat, SYM_L_GLOBAL)
+ ANNOTATE_NOENDBR // is_sysenter_singlestep
SYM_CODE_END(entry_SYSENTER_compat)
/*
" .pushsection .init.text, \"ax\", @progbits\n"
" .type int3_magic, @function\n"
"int3_magic:\n"
+ ANNOTATE_NOENDBR
" movl $1, (%" _ASM_ARG1 ")\n"
ASM_RET
" .size int3_magic, .-int3_magic\n"
static int __init
int3_exception_notify(struct notifier_block *self, unsigned long val, void *data)
{
+ unsigned long selftest = (unsigned long)&int3_selftest_ip;
struct die_args *args = data;
struct pt_regs *regs = args->regs;
+ OPTIMIZER_HIDE_VAR(selftest);
+
if (!regs || user_mode(regs))
return NOTIFY_DONE;
if (val != DIE_INT3)
return NOTIFY_DONE;
- if (regs->ip - INT3_INSN_SIZE != (unsigned long)&int3_selftest_ip)
+ if (regs->ip - INT3_INSN_SIZE != selftest)
return NOTIFY_DONE;
int3_emulate_call(regs, (unsigned long)&int3_magic);
* INT3 padded with NOP to CALL_INSN_SIZE. The int3_exception_nb
* notifier above will emulate CALL for us.
*/
- asm volatile ("int3_selftest_ip: int3; nop; nop; nop; nop\n\t"
+ asm volatile ("int3_selftest_ip:\n\t"
+ ANNOTATE_NOENDBR
+ " int3; nop; nop; nop; nop\n\t"
: ASM_CALL_CONSTRAINT
: __ASM_SEL_RAW(a, D) (&val)
: "memory");
SYM_CODE_START(secondary_startup_64)
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR
/*
* At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
* and someone has loaded a mapped page table.
*/
SYM_INNER_LABEL(secondary_startup_64_no_verify, SYM_L_GLOBAL)
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR
/*
* Retrieve the modifier (SME encryption mask if SME is active) to be
jmp *%rax
1:
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR // above
/*
* We must switch to a new descriptor in kernel space for the GDT
pushq %rax # target address in negative space
lretq
.Lafter_lret:
+ ANNOTATE_NOENDBR
SYM_CODE_END(secondary_startup_64)
#include "verify_cpu.S"
".type __kretprobe_trampoline, @function\n"
"__kretprobe_trampoline:\n"
#ifdef CONFIG_X86_64
+ ANNOTATE_NOENDBR
/* Push a fake return address to tell the unwinder it's a kretprobe. */
" pushq $__kretprobe_trampoline\n"
UNWIND_HINT_FUNC
.code64
SYM_CODE_START_NOALIGN(relocate_kernel)
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR
/*
* %rdi indirection_page
* %rsi page_list
SYM_CODE_START_LOCAL_NOALIGN(virtual_mapped)
UNWIND_HINT_EMPTY
+ ANNOTATE_NOENDBR // RET target, above
movq RSP(%r8), %rsp
movq CR4(%r8), %rax
movq %rax, %cr4
#include <linux/linkage.h>
#include <linux/error-injection.h>
#include <linux/kprobes.h>
+#include <linux/objtool.h>
asmlinkage void just_return_func(void);
".type just_return_func, @function\n"
".globl just_return_func\n"
"just_return_func:\n"
+ ANNOTATE_NOENDBR
ASM_RET
".size just_return_func, .-just_return_func\n"
);
.align RETPOLINE_THUNK_SIZE
SYM_CODE_START(__x86_indirect_thunk_array)
+ ANNOTATE_NOENDBR // apply_retpolines
#define GEN(reg) THUNK reg
#include <asm/GEN-for-each-reg.h>